Cortana vs. Siri vs. Google Now: Why Apple’s Siri Is Best

 Cortana vs. Siri vs. Google Now: Why Apple’s Siri Is Best

Siri kicked off the voice-enabled personal assistant trend, but she now has two big reasons to look over her shoulder: Cortana for Windows Phone, which is smarter in some ways, and Google Now, which many Android users have come to love.